Abstract:Pollen morphology of 15 species of genus Calamus (Palmae) from China were studied by means of light microscopy and scanning electronic microscopy. The structures of pollen grains in observed species are of sametype. The apertures is dicolpate, the tectum of exine is reticulate (C. macrorrhynchus) or perforate (C. rhabdocladus).It is the first time that perforate, verrucose (C. pulchellus) and rugulose (C. flagellum) were observed on the exine textum of the genus Calamus. The size, shape and exine ornamentation，verrucose，exine thickness，and the size of lumina in pollen grains are of great significance in the systematics at species level of the genus Calamus．
